Composition-board-forming machine.



R. A. PLUMB & C. R. WEED. comPdsmom BOARD FORMING MACHINE.

APPUCATION FILED JULY 19. 191E.

& 7 O 2 n0 1 Patented July 3, 1917.

2 SHEETS-SHEET I wueywtou 1705 I9. Plumb f R A. PLUMB & c. R. WEED. COMPOSITION BOARD FORMING MACHINE. APPLICAIION FILED JULY '19. I9l6.

Patnted July 3, 191:;

2 SHEETS-SHEET 2.

670mm: His emf Mame! BOY ALFRED PLUMB AliTD CLARENCE R. WEED, OF DETROIT. MICHIGAN, ASSIGNOBS TO TBUSSED CONCRETE STEEL COMPANY, 013 DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

To all? whom it may concern:

Be it known that we, ROY ALFRED PLUMB and. Cnauuison R. Waco, both citizens of the United States and residents 01 Detroit, in

5 the county of iVaync and State of Michigan, have invented a new and useful Compost tied-Board--Formiug lllachine, of which tl following is a specification The present invention has reference to a machine for and process of forming a refractory composition. board. (from fibrous, preferably fireproof, and cementitious materials) suitable for use on roofs, sidings and for general. protective purposes; it is de signed to overcome objections due chiefly to the str .ng of th belt) to which inachit "is of the continuously moving type are so iect, and to secure a greater production than has be u possible heretofore in machines of t .e z'irocating press type. To

these ends the invention consists in. a 111.0?- able belt that carries the wet mass from which the shingle or other board is to be made, together with a reciprocating positionedtransvcsely of the belt and so arranged as to 2. by pressure successively to the sections or 1011 tudinal portions of tried be]. also 111 a press located witl. belt in the manner stated having its lower platen whereby the dy removed from the y chai'uiels such might be caused by ra con'un'ession between two platens of the usual construction; also in a second suction means over which the belt pproachcs the press whereby, during the line the belt is stationary under the press, ti o excess water is partly removed from a pi; tionof the wet niiass, thus reducing the t essary for comprcssionin the l'iiress mu.v greatly increasing the output; also .ii Inc: is whereby the upper platen is 4.5 normally he d elevated to allow movement of the b i t; and in a process of :t'orniing boards wluu'ein rel 'rcly large substantially equal areas of the board are simultaneously subjected to suction to withdraw moisture, one of the 'eas being at the same time subjected throughout. The invention fun in the de f ibed and claime sis of construction In the drawings, Figure 1 is a side view, parts being broken away, show ng apre- COIMPOSITION-BOARD-FORMING MACHINE.

Specification of Letters Patent.

Patented. July 3. m1 *1 Application filed July 19, 1916. Serial No. 110,083.

tudinal bars 2 and 3. This frame supports 7 ndley's or rollers 4, 5, 6, 7, 8, 9, l0 and 11 (the former being driven from any convenient source of power, for example, through belt 12 and reduction gearing 13) over which a material carryin belt 15 passes in the direction indicated hy the arrow. Suitable connecting and disconnecting means (not shownlis of course employed whereby the power may be thrown on or oil at will. Adjacent the under side of the returnin run of the belt is a flopper or agind a perforated water pipe 19 .rial clinging to the surface of y be rinsed o The roller 9 is 8 to formv a wringer. A thin 3) of a wet mass of hydraulic tos) is delivered to the upper surface of the belt through a chute or box which receives its supply from. a suitable source, say the pipe 23 that leads to a mixer, not shown. The box is preferably provided with adjustable gage and smoothing plates 24L and 24. whereby the depth of the material on the belt is accurately determined.

At a point forwardly of the chute 22, the belt (which while tight enough to support the wet mass is nevertheless of such nature as to allow excess water to be withdrawn through it by suction, being preferably formed of felt or the like) passes over a suction box 25 which is connected. by means of a pipe 26. to a suitable exhausting device, also not shown. The belt continuing on its course passes over the lower platen 27 of a IQClPIOCEltlIlg press. the frame 28 of which extends across the belt and supports. the rain cylinder 29 in which thepiston 30 is reciprocabl nd, rigidly secured to and reciprocable 'th the piston, is the upper; platen 31 oft, the press. Rising from the platen 31 areilift rods the upper ends of:

it and fibrous material (such as asbestivly small .pull-back cylinder which restsupon and is in almement with the cylinder 29 of the ram. Water under. ressure supplied to the upper end 0 the cvlihder 29 through the pipe 40, valve 41 (ha'vin an actuating'handle 42) and pipe 43, an is exhausted therefrom through'the pipe 40, valve 41 and exhaust pipe 44, the latter of which. preferably leads to a suitable storage tank45 (Fig 2) from which the water is drawn by a pump 46 and de-' livered through an accumulator orconstant prgsure device,*which may be in the form of a cylinder 47 having a piston, the rod 47- of which is Weighted at 47 to an extension 48 of the pipe 43. The pipe 43-48 ispreferably 1n constant communication, through the pipe 49, with thelower end of the pullback cylinder 35. Thus it will be seen that the upper platen isnormall held elevated by the pressure of the water in the pullback cylinder; when, however, the handle 42 is -manipulated-to open the valve 41 water under the same pressure is admitted to the larger ram cylinder 29 and the platen is forced downwardly into pressing relation to the lower platen.

The lower platen 26 '(Fig. 2) is hollowed out to form a suction box in communication With the pipe 26, through the medium of a pipe 50 to which air may be admitted by a valve 51, the handle 52 of which ma be ac- 'tuated from a point near the hand e 42 of maintained The lower platen is faced "be drawn over the two valve 41 by means of a link 53 and lever 54 or in any other desired manner. When'the air is admitted through the valve 51, the suction is of course broken in both the platen m1 the suction box 25--thus the belt may suction devices without beingflsubjected to the friction which would arise were the vacuum constantly. y a plate secured in place by bolts 56 and havingj a series of small perforations 58;

v and asimilarplatc 59 is used in the suction box These plates are of the same size and'are preferably spaced apart a distance equal to a multiple of their lengths. Theplaten and box 25 might be made in one box divided byte central transverse partition.-

Opcration:-The wet fibrous hydraulic mass being, fed from the chute or box 22 to the belt 15331 the sheet or layer '21 of proper thickness iscarried forward by the belt(it being remembered that the upper platen is normally hold elevated from the belt) until it is located above the suction box 25, whereupon the belt is stop 1d and suction applied to remove a conide' ble ir -portion ofthe nwess water. The suction is then broken sheet comes under the press, the belt is and the power thrown onto the belt to draw sngqef' the moisture is not only removed more ra idly than in an ordinary ress, but the laterally extending channels t at are 'apt'to be formed bythe latter (giving rise to lines of easy fracture as well as detracting from the appearance of the board) are avoided. The moisture is withdrawn from the sheet in a direction at substantially right angles to the plane thereof and from substantially each individual portion of the area at the same time, namely while the prom is in operation. In the machine shown, it will be noticed that suction is simultaneously a plied to two substantially equal areas of t e sheet, one of the areas being also subjected to pressure throughoutat the same time. This mode of operation results in a lar output and a correspondin reduction 1n cost, as well as a compact su stantial product, and may be executed by machines of construction widely different from that shown.

I [The sheet is finally removed from the machine in short lengths by any suitable means, not shown, and stacked and subjected to a further very heavy pressure for a considerable period.

Obviously, the details of construction may be varied within wide limits. We do not, therefore, wish to be limited except as indicated by the subjoined claims.

1. A machinfor forming refractory composition board comprising a movable belt; means for supplying a layer of wet hydraulic cementitious material thereto, a reci ro'- eating press arran ed to squeeze. the elt with the material t ereon while the belt is stationary, said press comprising a platen having suction means whereby moisture is removed from the material as the latter is squeezed in the press. 1

2. A machine for forming refractory composition board comprising a movable belt, means for supplying a layer of wet hydraulic cementitious material thereto, a recipro- I ing located ar platen of a reciprocating passes on the way the lower position board comprising a movable belt, means for supplying a layer of wet hydraulice cementitious material thereto, a reciproeating press arranged to squeeze the belt with the material thereon While the belt is stationary, said press'comprising a platen having suction'means whereby moisture is removed from the material as the latter is squeezed in the press, and a suction box over which the belt with the material thereon to the press whereby excess moisture is removed fromt he wet layer.

4. A machine of the class described ,comprising a movable belt, means for supplying a layer of wet hydraulic cementitious mate rial thereto, a reciprocating press having its lower -platen disposed beneath the belt and its upper platen disposed above the belt whereby the latter with the material thereon may be squeezed while the belt is stationary, laten having suction means whereby moisture is removed from the material as the latter is squeezed in the press.

A machine of the class described comprising a movable belt, means for supplying a layer ofwet hydraulic cementitious mate- ;rial thereto, a reciprocating press having its loWerpla-ten disposed beneath the belt and its upper platen disposed above the belt whereby the latter with the material thereon may be squeezed while the belt is stationary, the lower platen being fixed and having suctihn means whereby moisture is removed from the material as the latter is squeezed in the press, and means for causing the upper platen to approach t e lower platen.

6. A machine for orming refractory composition board comprising a movable belt, means for sup lying ajlayer of wet hydraulic cementitio s material thereto, means for movin the belt at intervals,- a suction box over w ich the belt is drawn whereby excess moisture -iremovf'd "from the material, means for breaking, the suction in the-box at will to enable the belt to be, drawn over the box. without 'excessive/ friction,; and a press arranged tor-operate upon the belt and material after ;tl ;1ey "have-"passed the suction box'fto further remove moisture from the material. f a

7. A machmc for f rming refractory composition board comprising-a pair of erforated suction intake elements, .a bet arrangedto assover said elements, the intake elementiover which the belt passes last heplying a composition board area of material on the belt press, means for supplying a layer of wet ibrous plastic material to the belt, a reciprocating platen arranged to coiiperate' with the platen in which the intake element is located to squeeze the material, means for suction to both intake elements,

which the belt passes last beinglocated in a r platen'of a reciprocating press, means for applying a layer of wet fibrous plastic matcrlal to the belt, a platen arranged to 00* operate with the platen in which the intake element is located to squeeze the material on the belt, and means for drawing the belt forwardly stepby-step, the arrangement being such that an area of the belt which registers with the first intake element at one step registers at a later step with the other intake element.

, 9. In combination, a belt, means for suplayer of wet plastic material thereto, a reciprocating press including a suction platen across which the belt passes, another platen cooperating therewith, and means for moving the belt, whereby the moisture may be expelled from relatively large transverse elements of the material as they are drawn step by step into registration with the suction platen. r

10. Ainachine for forming refractor comprising a movab e belt, means for moving the belt, means for supplying a well-mi1ead layer of wet fibrous hydraulic cementitious material thereto, a reciprocating press arranged to simultaneously squeeze all portions of a considerable while the belt is stationary, said press comprising a platen having suction means whereby moisture is simultaneously removedffrom the various portions of the area, means tending to constantly apply suction to the plate? a fii' ROY ALFRED PLUMB. CLARENCE a. WEED. 

